The black dots on the face may be blackheads, pigmented moles, freckles, etc., and need to be analyzed according to the specific performance to determine the cause. 1, blackheads: blackheads belong to acne, when excessive sebum secretion, sebum, keratin plugs, etc. accumulate in the mouth of the hair follicle is formed acne, surface sebum oxidation can form blackheads. When blackheads occur, you should clean your skin well, avoid squeezing and scratching with your hands, and use skin care products with moisturizing and cleansing functions. Eat a light diet, drink more water, and eat more green vegetables and fruits. Pay attention to rest and avoid staying up late. If the symptoms of blackhead acne are more serious, you should seek medical attention promptly. 2. Pigmented nevus: It is a benign skin growth, and the cause of occurrence may be related to genetics, ultraviolet radiation and other factors. It is characterized by scattered pinpoint to corn-sized black spots on the face, which are usually not accompanied by pain or itching. Treatment can be done by laser or surgery; 3. Freckles: pigmented spots on the skin of young and middle-aged women in the sun, which are related to heredity. Sun exposure should be avoided and topical shading agents should be used when going out. Treatment can be done with topical corrosive drugs or laser treatment, but it is easy to recur and attention should be paid to avoiding light; 4. Others: If local inflammatory reaction leads to post-inflammatory pigmentation, it can be relieved by drugs or laser.